#5 #407 第五次实验

students/net1814080903214/app/src/main/AndroidManifest.xml

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
-    package="edu.hzuapps.androidlabs">
+    package="edu.hzuapp.androidlabs.net1814080903141">
 
     <application
         android:allowBackup="true"
@@ -9,13 +9,27 @@
         android:roundIcon="@mipmap/ic_launcher_round"
         android:supportsRtl="true"
         android:theme="@style/AppTheme">
-        <activity
-            android:name=".Net1814080903214Activity"
+        <activity android:name=".RecordActivity"
+            android:parentActivityName=".Net1814080903141Activity">
+            <meta-data
+                android:name="android.support.PARENT_ACTIVITY"
+                android:value=".Net1814080903141Activity"></meta-data>
+        </activity>
+        <activity android:name=".GameActivity"
+            android:parentActivityName=".Net1814080903141Activity">
+            <meta-data
+                android:name="android.support.PARENT_ACTIVITY"
+                android:value=".Net1814080903141Activity"></meta-data>
+        </activity>
+        <activity android:name=".Net1814080903141Activity">
             <intent-filter>
-                <action android:name="android.intent.action.MAIN" />
-                <category android:name="android.intent.category.LAUNCHER" />
+                <action android:name="android.intent.action.MAIN"/>
+                <category android:name="android.intent.category.LAUNCHER"/>
             </intent-filter>
         </activity>
+        <provider
+            android:authorities="edu.hzuapps.androidlabs.ContentProviderOfRecords"
+            android:name=".ContentProviderOfRecords"/>
     </application>
 
 </manifest>

students/net1814080903214/app/src/main/java/edu/hzuapps/androidlabs/Records.java

@@ -0,0 +1,146 @@
+package edu.hzuapp.androidlabs.net1814080903141;
+
+import android.content.ContentProvider;
+import android.content.ContentUris;
+import android.content.ContentValues;
+import android.content.Context;
+import android.content.UriMatcher;
+import android.database.Cursor;
+import android.database.SQLException;
+import android.database.sqlite.SQLiteDatabase;
+import android.database.sqlite.SQLiteOpenHelper;
+import android.database.sqlite.SQLiteQueryBuilder;
+import android.net.Uri;
+import android.text.TextUtils;
+import java.util.HashMap;
+
+public class ContentProviderOfRecords extends ContentProvider {
+
+    static final String PROVIDER_NAME = "edu.hzuapps.androidlabs.ContentProviderOfRecords";
+    static final String URL = "content://" + PROVIDER_NAME + "/records";
+    static final Uri CONTENT_URI = Uri.parse(URL);
+    static final String _ID = "_id";
+    static final String SCORE = "score";
+    static final String BEST = "best";
+    static final int RECORDS = 1;
+    static final int RECORD_ID = 2;
+    static final UriMatcher uriMatcher;
+    static {
+        uriMatcher = new UriMatcher(UriMatcher.NO_MATCH);
+        uriMatcher.addURI(PROVIDER_NAME, "records", RECORDS);
+        uriMatcher.addURI(PROVIDER_NAME, "records/#", RECORD_ID);
+    }
+    private SQLiteDatabase db;
+    static final String DATABASE_NAME = "Game";
+    static final String TABLE_RECORDS = "records";
+    static final int DATABASE_VERSION = 1;
+    static final String CREATE_DB_TABLE =
+            " CREATE TABLE " + TABLE_RECORDS +
+                    " (_id INTEGER PRIMARY KEY AUTOINCREMENT, " +
+                    " score TEXT NOT NULL, " +
+                    " best TEXT NOT NULL);";
+    private static class DatabaseHelper extends SQLiteOpenHelper {
+        DatabaseHelper(Context context) {
+            super(context, DATABASE_NAME, null, DATABASE_VERSION);
+        }
+        @Override
+        public void onCreate(SQLiteDatabase db) {
+            db.execSQL(CREATE_DB_TABLE);
+        }
+        @Override
+        public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
+            db.execSQL("DROP TABLE IF EXISTS " + TABLE_RECORDS);
+            onCreate(db);
+        }
+    }
+    private static HashMap<String, String> RECORDS_PROJECTION_MAP;
+    public ContentProviderOfRecords() {
+    }
+    @Override
+    public String getType(Uri uri) {switch (uriMatcher.match(uri)){
+        case RECORDS:
+            return "vnd.android.cursor.dir/vnd.example.students";
+        case RECORD_ID:
+            return "vnd.android.cursor.item/vnd.example.students";
+        default:
+            throw new IllegalArgumentException("Unsupported URI: " + uri);
+    }
+    }
+    @Override
+    public Uri insert(Uri uri, ContentValues values) {
+        long rowID = db.insert(TABLE_RECORDS, "", values);
+        if (rowID > 0) {
+            Uri _uri = ContentUris.withAppendedId(CONTENT_URI, rowID);
+            getContext().getContentResolver().notifyChange(_uri, null);
+            return _uri;
+        }
+        throw new SQLException("无法插入数据 " + uri);
+    }
+    @Override
+    public boolean onCreate() {
+        Context context = getContext();
+        DatabaseHelper dbHelper = new DatabaseHelper(context);
+        db = dbHelper.getWritableDatabase();
+        return (db == null) ? false : true;
+    }
+    @Override
+    public Cursor query(Uri uri, String[] projection, String selection,
+                        String[] selectionArgs, String sortOrder) {
+        SQLiteQueryBuilder qb = new SQLiteQueryBuilder();
+        qb.setTables(TABLE_RECORDS);
+        switch (uriMatcher.match(uri)) {
+            case RECORDS:
+                qb.setProjectionMap(RECORDS_PROJECTION_MAP);
+                break;
+            case RECORD_ID:
+                qb.appendWhere(_ID + "=" + uri.getPathSegments().get(1));
+                break;
+            default:
+                throw new IllegalArgumentException("Unknown URI " + uri);
+        }
+        if (sortOrder == null || sortOrder == "") {
+            sortOrder = SCORE;
+        }
+        Cursor c = qb.query(db, projection, selection, selectionArgs, null, null, sortOrder);
+        c.setNotificationUri(getContext().getContentResolver(), uri);
+        return c;
+    }
+    @Override
+    public int update(Uri uri, ContentValues values, String selection,
+                      String[] selectionArgs) {
+        int count = 0;
+        switch (uriMatcher.match(uri)) {
+            case RECORDS:
+                count = db.update(TABLE_RECORDS, values, selection, selectionArgs);
+                break;
+
+            case RECORD_ID:
+                count = db.update(TABLE_RECORDS, values, _ID + " = " + uri.getPathSegments().get(1) +
+                        (!TextUtils.isEmpty(selection) ? " AND (" + selection + ')' : ""), selectionArgs);
+                break;
+
+            default:
+                throw new IllegalArgumentException("Unknown URI " + uri);
+        }
+        getContext().getContentResolver().notifyChange(uri, null);
+        return count;
+    }
+    @Override
+    public int delete(Uri uri, String selection, String[] selectionArgs) {
+        int count = 0;
+        switch (uriMatcher.match(uri)) {
+            case RECORDS:
+                count = db.delete(TABLE_RECORDS, selection, selectionArgs);
+                break;
+            case RECORD_ID:
+                String id = uri.getPathSegments().get(1);
+                count = db.delete(TABLE_RECORDS, _ID + " = " + id +
+                        (!TextUtils.isEmpty(selection) ? " AND (" + selection + ')' : ""), selectionArgs);
+                break;
+            default:
+                throw new IllegalArgumentException("Unknown URI " + uri);
+        }
+        getContext().getContentResolver().notifyChange(uri, null);
+        return count;
+    }
+}

students/net1814080903214/app/src/main/java/edu/hzuapps/androidlabs/ResetActivity.java

@@ -1,41 +1,61 @@
-import androidx.appcompat.app.AppCompatActivity;
-
-import androidx.appcompat.app.AppCompatActivity;
+package edu.hzuapp.androidlabs.net1814080903141;
 
-import android.content.Intent;
+import android.content.ContentValues;
+import android.database.Cursor;
+import android.net.Uri;
 import android.os.Bundle;
 import android.view.View;
 import android.widget.Button;
+import android.widget.EditText;
+import android.widget.TextView;
+import android.widget.Toast;
+import androidx.appcompat.app.AppCompatActivity;
 
-public class HistoryScoreActivity extends AppCompatActivity {
-
+public class RecordActivity extends AppCompatActivity {
+    private Button btnclear;
+    private Button btncheck;
+    private StringBuilder sb;
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
-        setContentView(R.layout.activity_history_score);
-
-        Button returnToGame = (Button)findViewById(R.id.returnToGame);
-        returnToGame.setOnClickListener(new View.OnClickListener() {
-                                            @Override
-                                            public void onClick(View v) {
-                                                Intent intent = new Intent();
-                                                intent.setClass(HistoryScoreActivity.this, GameActivity.class);
-                                                startActivity(intent);
-                                            }
-                                        }
-        );
-
-        Button returnToMain = (Button)findViewById(R.id.returnToMain);
-        returnToMain.setOnClickListener(new View.OnClickListener() {
-                                            @Override
-                                            public void onClick(View v) {
-                                                Intent intent = new Intent();
-                                                intent.setClass(HistoryScoreActivity.this, Net1814080903106Activity.class);
-                                                startActivity(intent);
-                                            }
-                                        }
-        );
-
+        setContentView(R.layout.activity_record);
+
+        btncheck = findViewById(R.id.btncheak);
+        btnclear=findViewById(R.id.btnclear);
+
+        final RecordActivity thisActivity = this;
+
+
+        btncheck.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                thisActivity.showRecord();
+            }
+        });
+        btnclear.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                thisActivity.clearRecord();
+            }
+        });
+    }
+    private void showRecord() {
+        sb =new  StringBuilder();
+        Cursor cursor=getContentResolver().query(ContentProviderOfRecords.CONTENT_URI,null,null,null,null);
+        if (cursor.moveToFirst()){
+            do {
+                int gscore=cursor.getInt(cursor.getColumnIndex(ContentProviderOfRecords.SCORE));
+                int gbest=cursor.getInt(cursor.getColumnIndex(ContentProviderOfRecords.BEST));
+                sb.append("Score:"+gscore+"     "+"Best:"+gbest+"\n");
+                ((TextView) findViewById(R.id.trecord)).setText(sb);
+            }while ((cursor.moveToNext()));
+        }
+        cursor.close();
+    }
+    private void clearRecord(){
+        getContentResolver().delete(ContentProviderOfRecords.CONTENT_URI,null,null);
+        Toast.makeText(getBaseContext(), //
+                "删除成功! \n" + sb.toString(), Toast.LENGTH_LONG).show();
+        ((TextView) findViewById(R.id.trecord)).setText("");
     }
-
 }

students/net1814080903214/app/src/main/java/edu/hzuapps/androidlabs/StartActivity.java

@@ -1,28 +1,45 @@
-import androidx.appcompat.app.AppCompatActivity;
+package edu.hzuapp.androidlabs.net1814080903141;
 
-import android.content.Intent;
+import android.content.ContentValues;
+import android.net.Uri;
 import android.os.Bundle;
 import android.view.View;
 import android.widget.Button;
+import android.widget.EditText;
+import android.widget.Toast;
+import androidx.appcompat.app.AppCompatActivity;
 
 public class GameActivity extends AppCompatActivity {
-
+    private Button btnsave;
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_game);
+        btnsave=findViewById(R.id.btnsave);
+        final GameActivity thisActivity=this;
+        btnsave.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View view) {
+                thisActivity.saveRecord();
+            }
+        });
+    }
+    private void saveRecord() {
+        String score = ((EditText) findViewById(R.id.tscore)).getText().toString();
+        String best = ((EditText) findViewById(R.id.tbest)).getText().toString();
 
-        Button toHistoryScore = (Button)findViewById(R.id.toHistoryScore);
-        toHistoryScore.setOnClickListener(new View.OnClickListener() {
-                                              @Override
-                                              public void onClick(View v) {
-                                                  Intent intent = new Intent();
-                                                  intent.setClass(GameActivity.this, HistoryScoreActivity.class);
-                                                  startActivity(intent);
-                                              }
-                                          }
-        );
-
+        ContentValues record = new ContentValues();
+        record.put(ContentProviderOfRecords.SCORE,score);
+        record.put(ContentProviderOfRecords.BEST, best);
+        Uri uri = getContentResolver()
+                .insert(ContentProviderOfRecords.CONTENT_URI, record);
+        Toast.makeText(getBaseContext(),
+                "保存成功! \n" + uri.toString(), Toast.LENGTH_LONG).show();
 
+        this.showRecordInfo("", "");
+    }
+    private void showRecordInfo(String score, String best) {
+        ((EditText) findViewById(R.id.tscore)).setText(score);
+        ((EditText) findViewById(R.id.tbest)).setText(best);
     }
 }